Introduction to Thermistor Technology

author:Jarondate:2025-05-09hit:56

    NTC thermistor (NTC is the abbreviation of Negative Temperature Coefficient) is ahigh-density semiconducting ceramic element made of high-purity Mn,Co,Ni,Feand other oxidizing substances at high temperature.The basic characteristic is itsresistance value As the temperature increases and decreases,NT thermistors can bewidely used in temperature measurement,temperature compensation,and surgecurrent suppression.The main technical parameters of NTC thermistor

    Rated zero power resistance value R25(Ω)

    The rated zero power resistance value is the resistance value R25 measured by theNTC thermistor at a reference temperature of 25°℃.This resistance value is thenominal resistance value of the NTC thermistorB value(K)

    The B value reflects the resistance bending between two temperatures

    The B value is defined as:

    RT1:Zero power resistance value at temperature T1(K).R12:Zero power resistancevalue at temperature T2(K)

    T1 and T2 are two designated temperatures

    Dissipation coefficient(δ)

    Under the specified ambient temperature,NTC thermistor dissipation factor is the ratio of the power dissipated in the resistor to the corresponding temperaturechange of the resistor

    NTC thermistor dissipation factor (mW/K).P:Power consumed by NTCthermistor(mW)

    T:When NTC thermistor consumes power P,the corresponding temperature change (K) of the resistor body.

    Thermal time constant(T)

    Under zero power conditions,when the temperature changes suddenly,thetemperature of the thermistor changes by 63.2%of the two temperaturedifferences.

    The thermal time constant is directly proportional to the thermal capacity of the NTCthermistor and inversely proportional to its consumption coefficientt:

    T thermal time constant (S).C:Thermal capacity of NTC thermistor.δ:Dissipation coefficient of NTC thermistor.

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Thermistor description

THERMISTOR MODEL DESCRIPTION

MF52 A 503 F 3950 F B

 

 

  ①MF52 series:Bead-shaped precision NT thermistor

  ②Lead-out material type:A-tinned copper clad steel wire(CP wire)

  ③Nominal resistance:R25:503-50KΩ202-2.2K

  ④Tolerance range:F-±1%G-±2%H-±3%J-±5%K-±10%

  ⑤B value coefficient:3950-3950K3380-3380K

  ⑥Tolerance of B value:F-±1%G-±2%

  ⑦B value category:A-25/50℃ B-25/85℃C-25/100℃E-0/100℃or others

THERMISTOR CUSTOMIZATION IN STRUCTIONS

  1.Product model category

  2.Product nominal resistance(resistance at R25℃or others

  3.B value coefficient(example:B3435,B3950,B4100,etc.)

  4.Product accuracy requirements(1%~5%)

  5.Resistor pin length and specifications(enameled wire,Dumet wire,PVC wire,etc.)

  6.Operating temperature range

  7.Other requirements(labeling,printing,etc.)

Temperature sensor description

TEMPERATURE SENSOR MODEL DESCRIPTION

ST5*25 A- 103F3950F 26 CB 2651 L500 XH -2P

 

 

  ①Sensor probe:ST is copper-nickel-plated material,5*25 is the overall size

  ②Thermistor type:A-MF52A B-MF58B C-MF58D D-MF52D or others

  ③Resistance parameters:103F3950F-10K1%3950503F3950F-50K1%3950

  ④Wire size:22-#22awg 24-#24awg 26-#26awg 28-#28awg

  ⑤Wire category:C-double parallel wire F-Teflon wire H-sheathed wire

  ⑥Wire color:B-black Y-yellow R-red W-white

  ⑦Wire model:UL2651 UL3398 UL2464 Ul1332

  ⑧Wire length:The number suffixed with Lis the wire length

  ⑨End treatment:XH terminal model 2P is the number of sockets

TEMPERATURE SENSOR CUSTOMIZATION INSTRUCTIONS

  1.Product probe size specifications (tube,bullet,flange,etc.)

  2.Product nominal resistance(resistance at R25℃or others)

  3.B value coefficient(example:B3435,B3950,B4100,etc.)

  4.Product accuracy requirements(1%~5%)

  5.Wire type and length (UL2651,UL1332,UL3398,etc.)

  6.End treatment (immersion tin,terminal,audio socket,cold-pressed terminal,etc.)

  7.Operating temperature range8.Other requirements(casing,labeling,printing,independent packaging,cards,etc.)

Product display

Change oftemperature resistance characteristic

Temperature characteristic table

R25℃

5K

5K

10K

10K

10K

47K

50K

50K

68K

100K

B25/50℃

3470

3950

3435

3470

3950

3950

3950

3977

3950

3950

T(℃)

R(KQ)

R(KΩ)

R(KQ)

R(KΩ)

R(KQ)

R(KQ)

R(KΩ)

R(KΩ)

R(KQ)

R(KQ)

-30

52.1314

78.6230

113.6351

107.3375

157.2459

739.4443

786.643

866.19

1168.57

1718.49

-20

32.5659

43.7144

69.1948

67.0282

87.4288

432.7027

460.322

479.43

645.1514

948.752

-10

21.0522

25.9077

43.3184

42.5511

51.8154

253.3925

269.567

276.61

372.7304

548.1330

0

14.1005

15.8850

27.7660

27.4965

31.7700

154.3095

164.159

162.96

221.0537

325.0790

10

9.5512

9.8410

18.0944

18.0967

19.6819

90.7864

96.581

99.473

135.8116

199.7229

20

6.4840

6.2327

12.0956

12.1310

12.4654

57.8945

61.590

62.449

85.1240

125.1824

30

4.1496

4.0322

8.2746

8.2803

8.0644

38.4509

40.905

40.112

54.6630

80.3868

40

2.8924

2.6636

5.7810

5.7521

5.3271

25.9102

27.564

26.553

35.9929

52.9307

50

2.0321

1.7960

4.1218

4.0640

3.5920

16.8636

17.940

17.880

24.2733

35.6960

60

1.4734

1.2359

2.9926

2.9183

2.4718

11.7564

12.507

12.383

16.7300

24.6029

70

1.0783

0.8677

2.2082

2.1282

1.7353

8.2634

8.791

8.7463

11.7541

17.2854

80

0.7980

0.6213

1.6526

1.5749

1.2425

5.8985

6.275

6.2794

8.3953

12.3460

90

0.6140

0.4542

1.2553

1.1818

0.9083

4.2727

4.545

4.4788

6.0706

8.9273

100

0.4674

0.3372

0.9662

0.8985

0.6744

3.1396

3.340

3.2942

4.4541

6.5502